Position Description:

Job Title: Messaging SME – IT Infrastructure Expert (Microsoft O365)
Overview
We are seeking a highly experienced IT Infrastructure Expert specializing in Microsoft Exchange and Office 365 to lead complex enterprise messaging environments. This role demands deep technical expertise, strategic thinking, and hands on experience in designing, implementing, and optimizing large scale messaging platforms.

Key Responsibilities

. Architect, administer, and optimize enterprise level Microsoft Exchange (On Prem & Online) and Office 365 environments, ensuring high availability, security, and compliance.
. Act as a Tier 3 escalation point for critical messaging issues, performing advanced troubleshooting and root cause analysis across hybrid infrastructures.
. Design and implement migration strategies for Exchange Online and hybrid deployments, ensuring seamless integration with Active Directory and other enterprise systems.
. Monitor and analyse system performance, proactively identifying bottlenecks and implementing robust solutions to maintain optimal service delivery.
. Develop and enforce best practices, governance policies, and security standards for messaging platforms.
. Automate administrative tasks using advanced PowerShell scripting and other automation frameworks to improve operational efficiency.
. Collaborate with cross functional teams to evaluate emerging technologies, recommend improvements, and drive modernization initiatives.
. Maintain comprehensive documentation for architecture, processes, and troubleshooting guides.
. Provide technical leadership and mentorship to junior engineers and support teams.
. Ensure compliance with ITIL processes,



including incident, problem, and change management.

Required Skills & Experience

. 10+ years of progressive experience in enterprise messaging platforms, including Microsoft Exchange (On Prem & Online), Office 365, and hybrid environments.
. Proven expertise in Active Directory, DNS, SMTP, POP/IMAP protocols, Email Gateways and related networking fundamentals.
. Strong proficiency in PowerShell scripting for automation and remediation.
. Hands on experience with large scale migrations, tenant management, and license optimization.
. Deep understanding of Office 365 capabilities, service descriptions, and security/compliance features.
. Experience with Microsoft System Center Configuration Manager (SCCM) and integration with messaging platforms.
. Familiarity with monitoring tools for log analysis and performance optimization.
. Certifications preferred: Microsoft Certified Solutions Expert (MCSE), Microsoft 365 Certified: Enterprise Administrator Expert, ITIL Foundation.

Desired Attributes

. Strategic thinker with architectural mindset and ability to design scalable, resilient messaging solutions.
. Exceptional problem solving and analytical skills, capable of resolving complex technical challenges under pressure.
.



Strong communication and leadership skills to influence stakeholders and guide technical teams.
. Passion for innovation and continuous improvement in enterprise messaging technologies.

Skills:

- Active Directory
- Communication
- Exchange Server
- Infrastructure
- Microsoft Exchange

What you can expect from us:

Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace recent opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.

Come join our team—one of the largest IT and business consulting services firms in the world.

📌 Lead Systems Engineer - MS Exchange (Bengaluru)
🏢 CGI
📍 Bengaluru